High Quality Content by WIKIPEDIA articles! GRML – an acronym for General Reuse Markup Language – is a markup language similar to HTML and XML, using tags to organize data in files and web pages. Data is organized in columns and rows. Tags are used to define forms, images, and hyper-linking. Its syntax, like HTML, is based on a simplified subset of SGML. GRML is not in very wide use as of May 2005.